Iranian Foreign Ministry spokesman Hassan Qashqavi said on Monday that his country's nuclear activities have not slowed down, the official IRNA news agency reported.
"Iran's peaceful nuclear activities are going on according to the schedule," Qashqavi was quoted as saying.
He rejected the claims that the country's nuclear activities had slowed down and reiterated that the Iranian nuclear program was under direct supervision of the UN nuclear watchdog, Xinhua reported.
"Our cooperation with the International Atomic Energy Agency ( IAEA) is based on the Non-Proliferation Treaty (NPT) and its Safeguards Agreement," Qashqavi said.
The IAEA was conducting regular inspections from Iran's nuclear sites and products of the enrichment facilities, he said, rejecting the allegations that Iran's cooperation with the IAEA was not transparent.
"Nothing is concealed. We cooperate (with the IAEA) within the NPT and everything is clear and accurate," the Iranian Foreign Ministry spokesman added.
In a report on Iranian nuclear issue to the UN Security Council on Thursday, IAEA chief Mohamed ElBaradei said that only 164 gas centrifuges which were able to produce low-enriched uranium had been newly installed at Iran's Natanz uranium enrichment center since last December, which was slower than the past.
However, the report also pointed out that although the UN Security Council has implemented sanctions on Iran, Iran still refused to fulfill UN's requirement of stopping its uranium enrichment activity.
Iran's uranium enrichment program is questioned by many parties. Western countries like the United States' claim that Iran intends to secretly develop nuclear weapons, while the UN Security Council also requires Iran to suspend its uranium enrichment activity.
However, Iran insists that its nuclear plan is only for peaceful purposes, and continues its uranium enrichment activity despite the pressure from the Western countries and relevant resolutions and sanctions of the United Nations.